How Long is a Generation in the Bible?


The concept of a “generation” is often mentioned in the Bible, and understanding its meaning can help us better grasp the message and chronology presented in the Scriptures. However, the length of a generation in the Bible is not always clearly defined, and can be interpreted in various ways depending on the context in which it is used. In this blog post, we will delve into the different ways a generation is understood within the Bible and the significance it holds for believers today.

We will explore the various interpretations of a generation in the Bible, citing the New King James Version (NKJV) as our reference. By analyzing biblical passages and considering the historical context, we can gain a deeper understanding of the significance of a generation in biblical teachings and how it impacts our lives as believers.

uiib0bavwfs 1 How Long is a Generation in the Bible?

A Generation as a Time Span

The 40-Year Generation

One of the most common interpretations of a generation in the Bible is a period of 40 years. This understanding comes from several instances in the Old Testament where a generation is equated to this time frame. For example, in Numbers 32:13 (NKJV), the Lord’s anger was kindled against Israel, and He made them wander in the wilderness for 40 years, “until all the generation that had done evil in the sight of the Lord was gone.” Similarly, in Psalm 95:10 (NKJV), God speaks of a generation that wandered in the wilderness, stating, “For forty years I was grieved with that generation.”

The 70-80 Year Generation

Another interpretation of a generation’s length in the Bible is a period of 70 to 80 years. This idea is derived from Psalm 90:10 (NKJV), which states, “The days of our lives are seventy years; and if by reason of strength they are eighty years, yet their boast is only labor and sorrow; for it is soon cut off, and we fly away.” This passage suggests that a generation, in terms of the human lifespan, could be understood as a period of 70 to 80 years.

The 100-Year Generation

In some cases, the Bible associates a generation with a 100-year period. This is evident in Genesis 15:13-16 (NKJV), where God tells Abraham that his descendants will be afflicted for 400 years, and in the fourth generation, they will return to the land of Canaan. This implies that each generation lasts 100 years in this context.

A Generation as a Group of People

Descendants and Genealogy

The Bible also uses the term “generation” to refer to a group of people with a common ancestor. In this sense, a generation is not defined by a specific length of time but by a familial connection. For instance, in Matthew 1:1-17 (NKJV), we see the genealogy of Jesus Christ, which traces His lineage from Abraham to Joseph through 42 generations. Here, the emphasis is on the succession of descendants rather than the duration of their lives.

A Generation with a Shared Experience

In some instances, the Bible refers to a generation as a group of people who share a common experience. This can be seen in the story of the Israelites who were freed from slavery in Egypt. In Deuteronomy 29:22 (NKJV), Moses speaks to the Israelites, saying, “Your children, who rise up after you, and the foreigner who comes from a far land, would say, when they see the plagues of that land and the sicknesses which the Lord has laid on it… that the whole land is brimstone, salt, and burning.” In this context, the term “generation” refers to the people who have witnessed and experienced the plagues and the Exodus, and share the collective memory of those events.

A Generation in a Spiritual Context

The Bible also uses the concept of a generation in a spiritual sense, referring to people who share similar beliefs, attitudes, or behaviors. For example, in Matthew 12:39 (NKJV), Jesus speaks of “an evil and adulterous generation” that seeks a sign, and in Luke 11:50-51 (NKJV), He condemns “this generation” for the blood of the prophets. In these cases, the term “generation” is not used to denote a time frame or genealogical lineage but rather a group of people with a shared spiritual disposition.

A Generation in Prophecy

The Fig Tree Generation

In Matthew 24:32-34 (NKJV), Jesus uses the parable of the fig tree to describe the generation that will witness the end times: “Assuredly, I say to you, this generation will by no means pass away till all these things take place.” The fig tree is often interpreted as a symbol of Israel, and some scholars believe that the “generation” mentioned in this passage refers to the people who witnessed the rebirth of the nation of Israel in 1948. If this interpretation is accurate, it raises questions about the precise length of a generation in this prophetic context.

The Terminal Generation

In the context of biblical prophecy, the term “terminal generation” is sometimes used to describe the final generation of people who will be alive during the end times. This concept is derived from various passages in the New Testament, such as 1 Thessalonians 4:16-17 (NKJV), where Paul writes about the return of Jesus Christ and the resurrection of the dead: “Then we who are alive and remain shall be caught up together with them in the clouds to meet the Lord in the air.” While the Bible does not explicitly define the length of this terminal generation, it is often associated with the events that will unfold during the end times.


The concept of a generation in the Bible is multifaceted, encompassing various time frames, genealogical connections, shared experiences, and spiritual dispositions. While certain passages suggest that a generation may be approximately 40, 70-80, or 100 years, other instances emphasize the importance of familial ties, common experiences, or similar beliefs. Additionally, the notion of a generation plays a significant role in biblical prophecy, as it relates to the end times and the return of Jesus Christ.

Understanding the various interpretations of a generation in the Bible helps us appreciate the complexities and richness of the Scriptures. It also encourages us to reflect on our place within the generations of believers who have come before us and those who will follow in our footsteps. Ultimately, recognizing the significance of a generation in the Bible deepens our connection to the Word of God and to the broader community of faith.

As we study the Bible and seek to apply its teachings to our lives, it is essential to consider the broader context in which the concept of a generation is used. By doing so, we can better comprehend the messages conveyed by the Scriptures and strengthen our faith as we journey through life as part of a diverse and interconnected body of believers.

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